1394 Windows 7 - REQUEST_ISOCH_ATTACH_BUFFERS return STATUS_INSUFF

[Michel Archambault]

Hi!

I currently work to get working our 1394 driver under Windows 7 using the
new 1394ohci.sys driver.
I get an error in our driver because we try to do
REQUEST_ISOCH_ATTACH_BUFFERS and we get status STATUS_INSUFFICIENT_RESOURCES
from MS driver.
The first three call to REQUEST_ISOCH_ATTACH_BUFFERS return success but the
fourth failed.

Our driver work well under previous version of windows and with the 1394
legacy driver ship with Windows 7.

I generated *.etl trace file (like Don Miller from Microsoft suggest in
previous discussion http://www.osronline.com/ShowThread.cfm?link=166737), but
I cannot open this file using traceview.exe ship within the DDK and the
1394ohci.PDB in MS symstore.

Any clue?

Thank you!

[Michel Archambault]

Ok,

We fixed the problem.
We just set the wrong value for nNumberOfBuffers in
REQUEST_ISOCH_ALLOCATE_RESOURCES.
We set this value to 5 (4 + 1, one extra ref. msdn doc.)
We call 4 times REQUEST_ISOCH_ATTACH_BUFFERS but with nNumberOfDescriptors
set to 2 each time (since last february).
So we need to set nNumberOfBuffers to 9 (4*2 + 1) instead.

We never get the status STATUS_INSUFFICIENT_RESOURCES with the legacy driver.
It's strange!

Anyway! One more bug fixed :-)

Have a nice day!

Thanks to Don Miller for is help.

--
Michel Archambault